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Finding the Fourth Proportional to 43,561.62, 65,342.43 and 12,396.87

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Solution

The fourth proportional to 43,561.62, 65,342.43 and 12,396.87 is: 18,595.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,561.62 : 65,342.43 = 12,396.87 : x
  2. Step 2: Convert to fraction form
    43,561.62/65,342.43 = 12,396.87/x
  3. Step 3: Cross multiply
    43,561.62x = 65,342.43 × 12,396.87
  4. Step 4: Simplify right side
    43,561.62x = 810,041,610.19
  5. Step 5: Solve for x
    x = 810,041,610.19/43,561.62
  6. Step 6: Final answer
    x = 18,595.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.